US5127435A - Fluid pressure controller - Google Patents

Fluid pressure controller Download PDF

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Publication number
US5127435A
US5127435A US07/653,227 US65322791A US5127435A US 5127435 A US5127435 A US 5127435A US 65322791 A US65322791 A US 65322791A US 5127435 A US5127435 A US 5127435A
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US
United States
Prior art keywords
spool
relief valve
pressure
size orifice
chambers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/653,227
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English (en)
Inventor
Koji Takata
Koichi Hashida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advics Co Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD. reassignment SUMITOMO ELECTRIC INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HASHIDA, KOICHI, TAKATA, KOJI
Application granted granted Critical
Publication of US5127435A publication Critical patent/US5127435A/en
Assigned to ADVICS CO., LTD. reassignment ADVICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3655—Continuously controlled electromagnetic valves
    • B60T8/366—Valve details
    • B60T8/367—Seat valves, e.g. poppet valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/025—Electrically controlled valves
    • B60T15/028—Electrically controlled valves in hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3655—Continuously controlled electromagnetic valves
    • B60T8/366—Valve details
    • B60T8/3665—Sliding valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/50—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having means for controlling the rate at which pressure is reapplied to or released from the brake
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87217—Motor

Definitions

  • This invention relates to a fluid pressure controller especially suitable for use in a brake device for an automobile, amoung various fluid pressure systems. More specifically, this invention relates to a controller which can bypass the flow when a large flow is required and which can control the rate of increase of pressure increase or decrease ( or, in a strict sense the rate of increase or decrease of flow velocity) to a value corresponding to the magnitude of an electric command in a small-flow region.
  • variable-flow fluid pressure controller in which a pressure differential corresponding to the magnitude of an electric command is generated between first and second chambers formed at opposing ends of a spool through a variable-size orifice defined by a shoulder portion of the spool.
  • a fixed-size orifice is formed in a passage which maintains both chambers in comunication with each other so as to control the flow rate according to the pressure differential.
  • a bypass is formed which is adapted to be opened if the required flow rate is larger than a threshold value which is lower than the value which an electricity/power converter can attain by generating its maximum output.
  • FIG. 3 shows an example of a prior art device of this type which has a housing 111, a spool 112, an input port 113, a peripheral passage 114, a fixed-size orifice 115, an output port 116, a discharge port 117, a spring 110, a driver 119 and an electricity/power converter 120. It also has a bypass 123 for pressure increase and a bypass 124 for pressure reduction.
  • the bypass 123 performs its function when its elements 123a, 123b and 123c communicate with one another whereas the bypass 124 does so when its elements 124a 124b communicate with each other.
  • the bypasses are opened by an overstroke of the spool.
  • an extre stroke is required for the electricity/power converter.
  • the bypasses are formed in the spool itself, the length of the extra stroke has to be increased further to prevent the fluid leakage at the outer periphery of the spool.
  • An object of this invention is to provide a variable-flow fluid pressure controller having bypasses which obviates the abovesaid shortcomings and which requires no extra stroke of the electricity/power converter.
  • a relief valve for bypass is provided in the passage in parallel with the passage having the fixed-size orifice.
  • the relief valve is adapted to be opened when the required flow rate reaches its threshold value which is determined to be slightly lower than the value corresponding to the maximum output of thee electricity/power converter, by the differential pressure between the first and second chambers which corresponds to the required flow rate.
  • the structure which characterizes this invention can be applied to a one-way type controller for pressure increase only or for pressure reduction only, or for a two-way type controller for both pressure increase and pressure reduction.
  • a two-way type controller may be provided with only one of the relief valves, for pressure increase or reduction.
  • bypasses are opened by use of the overstroke of the spool
  • a plurality of such bypasses have to be formed in the high-precision parts, i.e. the spool and the guide surface in the housing accommodating the spool. This will lead to an increase in the production cost.
  • the relief valve will serve to obviate this shortcoming.
  • variable-flow control valve has excellent properties in that hydraulic shock, which causes noise and vibrations, can be reduced to a negligible level, and in that a precise feedback control is possible since the hydraulic vibration is not reflected in the measurements of the output fluid pressure.
  • variable-flow control valve According to this invention, during the transition period where a large flow is required, any excess flow above the threshold determined by the capacity of the electricity/power converter is supplied through the bypass. In the small-flow region where a smooth control is required, the merit of the variable-flow control valve is fully realized.
  • the variable-flow control valve according to this invention is compact and inexpensive and can be used in a wider range of industrial fields where electronic fluid pressure control is necessary.
  • FIG. 1 is a schematic sectional view of one embodiment of this invention
  • FIG. 2 is a schematic sectional view of another embodiment
  • FIG. 3 is a sectional view of a prior art device.
  • FIGS. 1 and 2 respectively have the same function as the prior art device which is shown in FIG. 3 for comparison purposes. Further, to facilitate understanding, they are shown schematically.
  • a fluid prssure controller 10 comprises a housing 11 having an input port 13, a discharge port 17 and an output port 16, and a spool 12 axially movably mounted in the housing 11.
  • a first chamber A is defined by one end of the spool 12 and the housing 11 whereas a second chamber B is defined by the other end of the spool and the housing so as to communicate with the output port 16.
  • the spool 12 is formed with an internal passage for fluid communication between the chambers A and B through a fixed-size orifice 15, and a peripheral passage 14 communicatiing the outer peripheral surface of the spool with the internal passage at a point between the fixed-size orifice 15 and the chamber.
  • the controller is further pprovided with an electricity/power converter 20 for driving the spool 12, and a spring 18 for keeping the spool in an initial position when the output of the electricity/power converter is zero.
  • passages 31 and 32 including relief valves 33 and 34, respectively, extend between the first and second chambers A and B in parallel with the internal passage which includes the fixed-size orifice 15. This is the main characterizing feature of the present invention.
  • the passages 31 and the valve 33 are for pressure increase while the passage 32 and the valve 34 are for pressure reduction.
  • the flow rate through the controller i.e. the flow rate through the fixed-size orifice
  • the pressure differential acrons the fixed-size orifice 15 that is, the pressure differential between the chambers A and B.
  • the pressure differential is, in turn, determined by the difference between the output of the electricity/power converter 20 and the force of the spring 18.
  • the spool 12 moves automatically so as to adjust the degree of opening of a variable-size orifice formed between the peripheral passage 14 and the input port 13 or between the former and the discharge port 17 to maintain the fluid pressure differential between the chambers A and B.
  • the controlled flow rate corresponds to the magnitude of the electric command given to the electricity/power converter.
  • the electricity/power converter has a limited capacity, the differential pressure attainable with the converter, and thus the flow rate through the fixed-size orifice, are limited.
  • the relief valves 33 and 34 have a relief pressure preset to a slightly smaller value than the above-described maximum attainable pressure differential.
  • the fixed-size orifice 15 may be provided in parallel with the relief valves or, as shown in FIG. 2, it may be formed by purposely imperfectly sealing the seat of one of the relief valves (e.g. by forming a cutout in the seat).
  • FIG. 2 shows the second embodiment in which the spool is made up of two spool portions 12-1 and 12-2, and in which ring valve members 26-1 and 26-2 are mounted on the spool portions 12-1 and 12-2, respectively, to form variable-size orifices between the ring valve members and shoulders of the spool portions.
  • one of the bypasses having a relief valve is provided outside the sleeve and the other relief valve is provided in one of the spool portions.
  • the initial position of the spool when the electricity/power converter 20 is not activated can be preset to any of the position for pressure increase, the position for pressure hold (both closed) and the position for pressure reduction by changing the arrangement of the spring 18 and the characteristics of the electricity/power converter 20.
  • the initial position of the spool when the electricity/power converter is not activated is the position for pressure increase. But by setting the position of the spool when not activated so that the peripheral passage 14 communicates with the discharge port 17, the initial position can be set at the position for pressure reduction. Also, if the spool position when the electricity/power converter not activated is set so that the peripheral passage 14 communicates with neither the input port 13 nor the discharge port 17, the initial position will correspond to the position for pressure hold.
  • the controllers are shown to have both the bypass for pressure increase and the bypass for pressure reduction. But if one of them is not necessarry, it may be omitted.
  • both embodiments show controllers operable in both axial directions. But a one-way type controller for either pressure increase only or pressure reduction only is possible simply by removing either the port 13, relief valve 336 and associated parts, or instead, the port 17, relief valve 34 and associated parts. In the former case, the port 16 is for higher pressure and the port 17 is for lower pressure whereas in the latter case, the port 13 is for higher pressure and the port 16 for lower pressure.
  • any other conventional design feature may be added.
  • any of the parts may be divided for easy assembly, a groove for fluid communication may be formed in the spool or a spring force adjusting means may be provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)
  • Servomotors (AREA)
  • Control Of Fluid Pressure (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
US07/653,227 1990-02-09 1991-02-08 Fluid pressure controller Expired - Lifetime US5127435A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2029828A JP2853237B2 (ja) 1990-02-09 1990-02-09 液圧制御装置
JP2-29828 1990-02-09

Publications (1)

Publication Number Publication Date
US5127435A true US5127435A (en) 1992-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US07/653,227 Expired - Lifetime US5127435A (en) 1990-02-09 1991-02-08 Fluid pressure controller

Country Status (5)

Country Link
US (1) US5127435A (de)
EP (1) EP0441343B1 (de)
JP (1) JP2853237B2 (de)
KR (1) KR960001881B1 (de)
DE (1) DE69110311T2 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306076A (en) * 1992-05-20 1994-04-26 G. W. Lisk Company, Inc. Proportional control valve with pressure compensation
US5356211A (en) * 1992-10-29 1994-10-18 Robert Bosch Gmbh Magnet valve
US5460199A (en) * 1992-07-13 1995-10-24 Sumitomo Electric Industries, Ltd. Flow control valve and control method therefor
US5480223A (en) * 1993-06-03 1996-01-02 Sumitomo Electric Industries, Ltd. Fluid pressure control device
US5732612A (en) * 1995-08-26 1998-03-31 Hydraulik-Ring Antriebs- Und Steuerungstechnik Gmbh Actuator for a position-adjusting device, preferably for a valve lift adjusting device of motor vehicles
US5876184A (en) * 1996-03-26 1999-03-02 Caterpillar Inc. Electrohydraulic pressure regulating valve
US6213568B1 (en) * 1997-03-15 2001-04-10 Continental Teves Ag & Co., Ohg Hydraulic braking system operated by extraneous force
US20060196566A1 (en) * 2005-03-02 2006-09-07 Tae-Kyung Kim Solenoid ball valve with bypass orifice
US20130061958A1 (en) * 2011-09-14 2013-03-14 Delphi Technologies, Inc. Pressure control valve
US20170067571A1 (en) * 2014-03-06 2017-03-09 Wabco Gmbh Solenoid valve

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4134427A1 (de) * 1991-10-18 1993-04-22 Teves Gmbh Alfred Blockiergeschuetzte hydraulische bremsanlage
DE4108028A1 (de) * 1991-03-13 1992-09-17 Teves Gmbh Alfred Hydraulikaggregat fuer hydraulische steuer- oder regelvorrichtungen
DE4134471A1 (de) * 1991-10-18 1993-04-22 Teves Gmbh Alfred Stromregelventil fuer eine blockiergeschuetzte hydraulische bremsanlage
JPH0680064A (ja) * 1992-07-13 1994-03-22 Sumitomo Electric Ind Ltd 液圧制御装置
DE4411683A1 (de) * 1994-04-05 1995-10-12 Teves Gmbh Alfred Hydraulische Bremsanlage mit Schlupfregelung
DE4427800A1 (de) * 1994-08-05 1996-02-08 Teves Gmbh Alfred Hydraulische Bremsanlage mit Radschlupfregelung
KR0121813B1 (en) * 1995-08-18 1997-12-08 Daewoo Electronics Co Ltd The solenoid valve for a.b.s.
KR0127551B1 (ko) * 1995-09-19 1998-04-06 배순훈 앤티로크 브레이크 시스템용 솔레노이드 밸브 및 제조방법
JPH10301634A (ja) * 1997-04-28 1998-11-13 Sumitomo Electric Ind Ltd 流量制御弁
DE102022200173A1 (de) * 2022-01-11 2023-07-13 Robert Bosch Gesellschaft mit beschränkter Haftung Elektromechanisch betätigbares Druckmittelsteuerventil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63211409A (ja) * 1987-02-27 1988-09-02 Atsugi Motor Parts Co Ltd 圧力制御弁
JPH0390462A (ja) * 1988-11-14 1991-04-16 Sumitomo Electric Ind Ltd 液圧制御装置及び同装置を用いたブレーキ装置
US5018797A (en) * 1988-11-14 1991-05-28 Sumitomo Electric Industries, Ltd. Fluid pressure controller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1048355A (fr) * 1950-11-15 1953-12-22 Wagner Electric Corp Perfectionnements relatifs à un système empêchant le glissement ou patinage destiné aux véhicules à moteur
GB959691A (en) * 1961-02-03 1964-06-03 Lucas Industries Ltd Vehicle hydraulic braking systems
GB2045372B (en) * 1979-02-23 1983-09-14 Lucas Industries Ltd Anti-skid brake control systems
JPH0238175A (ja) * 1988-07-29 1990-02-07 Aisin Seiki Co Ltd ブレーキ圧制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63211409A (ja) * 1987-02-27 1988-09-02 Atsugi Motor Parts Co Ltd 圧力制御弁
JPH0390462A (ja) * 1988-11-14 1991-04-16 Sumitomo Electric Ind Ltd 液圧制御装置及び同装置を用いたブレーキ装置
US5018797A (en) * 1988-11-14 1991-05-28 Sumitomo Electric Industries, Ltd. Fluid pressure controller

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306076A (en) * 1992-05-20 1994-04-26 G. W. Lisk Company, Inc. Proportional control valve with pressure compensation
US5460199A (en) * 1992-07-13 1995-10-24 Sumitomo Electric Industries, Ltd. Flow control valve and control method therefor
US5524659A (en) * 1992-07-13 1996-06-11 Sumitomo Electric Industries, Ltd. Flow control valve and control method therefor
US5356211A (en) * 1992-10-29 1994-10-18 Robert Bosch Gmbh Magnet valve
US5480223A (en) * 1993-06-03 1996-01-02 Sumitomo Electric Industries, Ltd. Fluid pressure control device
US5732612A (en) * 1995-08-26 1998-03-31 Hydraulik-Ring Antriebs- Und Steuerungstechnik Gmbh Actuator for a position-adjusting device, preferably for a valve lift adjusting device of motor vehicles
US5876184A (en) * 1996-03-26 1999-03-02 Caterpillar Inc. Electrohydraulic pressure regulating valve
US6213568B1 (en) * 1997-03-15 2001-04-10 Continental Teves Ag & Co., Ohg Hydraulic braking system operated by extraneous force
US20060196566A1 (en) * 2005-03-02 2006-09-07 Tae-Kyung Kim Solenoid ball valve with bypass orifice
US7367357B2 (en) * 2005-03-02 2008-05-06 Eaton Corporation Solenoid ball valve with bypass orifice
US20130061958A1 (en) * 2011-09-14 2013-03-14 Delphi Technologies, Inc. Pressure control valve
US8746279B2 (en) * 2011-09-14 2014-06-10 Delphi Technologies, Inc. Pressure control valve
US20170067571A1 (en) * 2014-03-06 2017-03-09 Wabco Gmbh Solenoid valve
US10125887B2 (en) * 2014-03-06 2018-11-13 Wabco Gmbh Solenoid valve

Also Published As

Publication number Publication date
EP0441343A2 (de) 1991-08-14
EP0441343B1 (de) 1995-06-14
KR960001881B1 (ko) 1996-02-06
DE69110311D1 (de) 1995-07-20
DE69110311T2 (de) 1996-02-08
JPH03234987A (ja) 1991-10-18
JP2853237B2 (ja) 1999-02-03
EP0441343A3 (en) 1992-07-08

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Owner name: ADVICS CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SUMITOMO ELECTRIC INDUSTRIES, LTD.;REEL/FRAME:020817/0585

Effective date: 20080228